spidermonkey: Fix building 31.5 on GCC 5.

authored by Jookia and committed by Tuomas Tynkkynen cde9fb47 6c4ba065

+1
+1
pkgs/development/interpreters/spidermonkey/31.5.nix
··· 18 18 postUnpack = "sourceRoot=\${sourceRoot}/js/src"; 19 19 20 20 preConfigure = '' 21 + export CXXFLAGS="-fpermissive" 21 22 export LIBXUL_DIST=$out 22 23 ''; 23 24